D.all of the above translations could be correct.
Well do not know if this answers your question but I hope this helps;
Schools in Puerto Rico are from 8:00 AM to 3:00 PM in public schools in Puerto Rico.Many of these schools provide Internet service.
1 los chicos calleron 2 el profesor cree
Rafael y Estela han caminado al correo.
That is the most exact translation, it was a <u>periphrasis</u> (conjugated verb + impersonal verb).
<h3><em><u>MissSpanish</u></em></h3>
Answer:
How will they explain it?
They will explain it carefully.
We will explain it carefully.
I will explain it carefully.
He will explain it carefully